Year 13 biology
Every topic for the year is below, arranged by the term it is taught. Choose a term to show only that term: each topic has a lesson video, worked questions and practice at three levels.
Autumn term
- BiologyPhotosynthesisThe light-dependent and light-independent reactions, the role of chloroplasts, photophosphorylation and the Calvin cycle, limiting factors, and investigating photosynthesis in the laboratory.100 questionsLesson video
- BiologyRespirationAerobic and anaerobic respiration, glycolysis, the link reaction, the Krebs cycle and oxidative phosphorylation, the roles of coenzymes, and the respiration of other respiratory substrates.100 questionsLesson video
- BiologyEnergy transfer in ecosystems and nutrient cyclesBiomass and energy transfer between trophic levels, productivity and efficiency, the effects of farming practices, and the nitrogen and phosphorus cycles with the role of microorganisms and fertilisers.100 questionsLesson video
Spring term
- BiologyStimuli, receptors and the control of heart rateSurvival and response, tropisms and taxes, kineses, the structure and function of receptors such as the Pacinian corpuscle and photoreceptors in the eye, and the control of heart rate.100 questionsLesson video
- BiologyNerve impulses, synapses and muscle contractionResting and action potentials, the passage of an impulse and the effect of myelination, synaptic transmission and its effects, the structure of skeletal muscle and the sliding filament theory.100 questionsLesson video
- BiologyHomeostasisNegative feedback and why a stable internal environment matters, the control of blood glucose by insulin, glucagon and adrenaline, diabetes, and the control of blood water potential by the kidney and ADH.100 questionsLesson video
Summer term
- BiologyInheritance and populationsGenotype and phenotype, monohybrid and dihybrid crosses, sex linkage, codominance, multiple alleles, epistasis, the chi-squared test, the Hardy-Weinberg principle and allele frequencies.100 questionsLesson video
- BiologyEvolution, speciation and populations in ecosystemsNatural selection and evolution, genetic drift, speciation, the effect of environmental factors on populations, interspecific and intraspecific competition, succession and conservation, and estimating population size.100 questionsLesson video
- BiologyControl of gene expressionGene and chromosome mutations, stem cells and totipotency, regulation of transcription and translation, epigenetics, and the links between gene expression and cancer.100 questionsLesson video
- BiologyGenome projects and gene technologiesSequencing methods and genome projects, recombinant DNA technology, in vivo and in vitro cloning, DNA probes, genetic engineering and fingerprinting, and the ethics of gene technologies.100 questionsLesson video